CN107287988A - A kind of preparation method of micron/nano composite fiber electric insulation paper - Google Patents
A kind of preparation method of micron/nano composite fiber electric insulation paper Download PDFInfo
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- CN107287988A CN107287988A CN201710598060.1A CN201710598060A CN107287988A CN 107287988 A CN107287988 A CN 107287988A CN 201710598060 A CN201710598060 A CN 201710598060A CN 107287988 A CN107287988 A CN 107287988A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
- D21F13/10—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production using board presses
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
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- Organic Insulating Materials (AREA)
Abstract
The present invention relates to a kind of preparation method of micron/nano composite fiber electric insulation paper, belong to electric insulation paper technical field.Softwood pulp dry pulp plate and other micrometer fibers are starched into dry pulp plate immersion 12 hours in deionized water respectively, pulpboard is torn into 25mm × 25mm small pieces after immersion is good.The needlebush pulpboard and other micrometer fibers pulpboards handled well are discongested respectively followed by beater, are beaten.Then carry out after ultrasonic disperse processing, take appropriate softwood pulp fiber, other micrometer fibers and nanofiber to be mixed, handled 5 minutes~20 minutes using agitating device.Can also be using mixing mashing mode, needlebush pulpboard and other micrometer fibers pulpboards that will be by pretreatment be directly mixed in proportion, are then discongested, are beaten using beater, Xiao Baier beating degrees are equally controlled between 10 ° of SR to 60 ° of SR.This method technical process is simple, easy to operate, and effectively lifts the tensile strength and disruptive field intensity of electric insulation paper.
Description
Technical field
The present invention relates to a kind of preparation method of micron/nano composite fiber electric insulation paper, using nanofiber and micron
Fiber composite improves machinery, the electric property of existing needle-leaved wood fibre insulating paper, belongs to electric insulation paper technical field.
Background technology
Insulating paper has the advantages that excellent performance, cost are low, environment-friendly, renewable as a kind of special use paper.Therefore
It is widely used in the oil-immersed power transformer and converter power transformer of various voltage class.At present, cotton is generally used in the world
Slurry and softwood pulp prepare insulating paper, domestic then use 100% non-bleached sulphate softwood pulp.The quick hair of power industry
Exhibition proposes higher requirement to transmission distance and transmission line capability, to realize " transferring electricity from the west to the east " or even " Asia-Europe intercontinental transmission of electricity ", needs
Greatly develop extra-high voltage direct-current transmission technology.Converter power transformer as DC transmission system key core equipment, its valve side around
The complicated severe electric field form of group make it that existing paper oil insulation material failure is continuous.It is therefore desirable to further improve existing transformation
The performance of device insulating paper.For insulating paper, electric stress, mechanical stress and thermal stress can be born in actual use, therefore
Insulating paper not only needs to have excellent electric property, also needs possess good mechanical performance and hot property.Wherein mechanical performance
There is material impact to the aging of insulating paper, the service life of isolit is determined to a certain extent, therefore need to focus on
Concern.
In addition to needle-leaved wood fibre, common fiber also includes broad-leaved wood fiber, flaxen fiber, cotton fiber, the micron such as bamboo fibre
Fiber.Broad-leaved wood fiber belongs to wood-fibred, and it uses broad-leaved wood to be made, predominantly dicotyledonous angiosperm, and conventional has
Eucalyptus, poplar, birch etc..It is characterized in that log material is harder, fibrocyte content is low, fiber is shorter and diameter is smaller.With eucalyptus
Exemplified by wood, fibrocyte content is 82.4%, and average fiber length is only 0.68mm, and width is only 16.8 μm.Flaxen fiber length
Longer, the content of cellulose and crystallinity of cotton fiber are higher.Although China's Forest Resources are deficient, bamboo resource very abundant, bamboo
The annual production of slurry accounts for global a quarter.Therefore, explore and prepare insulating paper using bamboo fibre, can effectively solve to entering lancet
The dependence of leaf wood-fibred, promotes the production domesticization of insulating paper.Compared with needle-leaved wood fibre, bamboo fibre cell wall thickness, surface pits are small
And it is distributed sparse, single fiber intensity height.The tensile strength of single Moso bamboo fibres is between 1.43GPa to 1.69GPa, higher than exhausted
Most of needle-leaved wood fibres.Bamboo fibre is added to the reduction that cost of implementation is possible in needle-leaved wood fibre widely used till now
With the lifting of insulating paper performance.
Nano modification is an important means for improving material property.1994, Lewis first officials proposed nanometer electricity
The concept of medium.2002, Nelson etc. confirmed the dielectric feasibility of nanometer by experiment, and nanometer dielectric is studied afterwards
As focus.For insulating paper, have research and inquirement addition inorganic nanoparticles to lift the electric property of insulating paper, such as receive
Rice SiO2, nano-MgO, nano imvite etc., but because the compatibility between inorganic nano-particle and organic plant fiber is bad,
So that the bond strength reduction between fiber, the mechanical performance for preparing gained insulating paper declines.The length of micron string exists
Millimeter rank, width can be referred to as micrometer fibers in micron level.Because micron string can be segmented further in structure
For microfibre, former microfibre, therefore just it can be received after being handled by physics, chemical method micron string
Rice fiber.The width of nanofiber is tens nanometers, and length can be hundreds of nanometers, or even thousands of nanometers.Compared to inorganic nano
Particle, nano-scale fiber has the following advantages that：Nano-scale fiber is as organic nano additive first, at surface grafting
Reason, modified insulating paper preparation technology is simple；Secondly there is hydrogen bond action between nano-scale fiber and micron order fiber, it is not easy to from
It is diffused into paper in transformer oil, modified effect is relatively more stable；Furthermore nano-scale fiber belong to renewable resource, it is degradable,
It is environment-friendly.
In summary, different types of micrometer fibers have respective characteristic advantage, by needle-leaved wood fibre and other microns
Fiber blend, helps to learn from other's strong points to offset one's weaknesses, the mechanical performance of the compound electric insulation paper of lifting.Nanofiber can be in needlebush insulating paper
Um porous structure on form novel secondary structure, change average pore size distribution, so as to improve needle-leaved wood fibre insulating paper
Mechanical performance and electric property.Nanofiber is considerable as the nanometer additive prospect of electric insulation paper.
The content of the invention
The purpose of the present invention is a kind of preparation method for improving electric insulation paper electromechanical properties, to existing electric insulation paper
Preparation method is improved, and micrometer fibers or nanofiber is added wherein, to improve machinery, the electrical resistance of electric insulation paper
Energy.
The preparation method of micron/nano composite fiber electric insulation paper proposed by the present invention, comprises the following steps：
(1) at ambient temperature, needlebush dry pulp plate and plant nanometer fiber dry pulp plate are immersed in deionized water respectively
In, soak 12 hours, obtain needlebush pulp lap and plant nanometer fiber wet pulp plate, described plant nanometer fiber is leaf wood
Any one or more of fiber, bamboo fibre, flaxen fiber and cotton fiber are mixed in any proportion；
(2) above-mentioned needlebush pulp lap and plant nanometer fiber wet pulp plate are discongested respectively, are beaten, make the matter of slurries
It is 0.5~2% to measure percent concentration, and beating time is 10 minutes~50 minutes, and it is 10 ° of SR to make the Xiao Baier beating degrees of slurry
~60 ° of SR, respectively obtain the first pulp suspension and the second pulp suspension；
(3) by nanofiber dispersion in deionized water, the 3rd paper pulp that mass percent concentration is 0.5~2% is obtained
Suspension, ultrasonic disperse processing is carried out to the 3rd pulp suspension, and ultrasonic power is 500W~1800W, and ultrasonic time is 5 minutes
~30 minutes；
(4) above-mentioned first pulp suspension, the second pulp suspension and the 3rd pulp suspension are blended, blending
Solids in suspension fiber quality ratio is：First pulp suspension:Second pulp suspension:3rd pulp suspension=1st:(0~
0.2):Stirred after (0~0.2), blending, mixing time 5 minutes~20 minutes obtains micron/nano composite fiber suspension；
(5) above-mentioned micron/nano composite fiber suspension is put into sheet forming equipment and carries out dehydration forming, insulated
L Water Paper page；
(6) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 100N/cm2~500N/cm2, hot pressing temperature
For 100 DEG C~150 DEG C, hot pressing time is 5 minutes~30 minutes, obtains the electric insulation paper after hot-pressing drying.
(7) the above-mentioned electric insulation paper product prepared is placed in the constant temperature and humidity that 25 DEG C of temperature, relative humidity are 50%
Stored in environment standby.
Micro-nano complex fiber electric insulation Preparation Method made of paper proposed by the present invention, its advantage is, this preparation method is to pin
A certain proportion of non-needle-leaved wood fibre and nanofiber are added in leaf wooden insulation paper, technical process is simple, easy to operate, can not increased
On the premise of adding production equipment, directly using this preparation method, the tensile strength and disruptive field intensity of electric insulation paper are effectively lifted.
Deionized water in this method can be replaced distilled water, pure water, or other low conductivity industrial waters Jing Guo purified treatment.
When production equipment is by prescribing a time limit, being beaten also can be using mixing mashing mode, will be micro- with other by the needlebush pulpboard pre-processed
Rice fiber board is directly mixed in proportion, is then discongested, is beaten using beater, and the equally control of Xiao Baier beating degrees exists
Between 10 ° of SR to 60 ° of SR.Using the method for the invention, the tensile strength of electric insulation paper and disruptive field intensity can be lifted
20% or so.
Brief description of the drawings
Fig. 1 is the pore-size distribution of needle-leaved wood fibre insulating paper.
Fig. 2 is the pore-size distribution of 10% nanofiber and 90% micrometer fibers composite-insulating paper.
Fig. 3 is the scanning electron microscope diagram of needle-leaved wood fibre insulating paper.
Fig. 4 is the scanning electron microscope diagram of 10% nanofiber and 90% micrometer fibers composite-insulating paper.
Embodiment
Electric insulation containing broad-leaved wood fiber Preparation Method made of paper proposed by the present invention, comprises the following steps：
(1) at ambient temperature, needlebush dry pulp plate and plant nanometer fiber dry pulp plate are immersed in deionized water respectively
In, soak 12 hours, obtain needlebush pulp lap and plant nanometer fiber wet pulp plate, described plant nanometer fiber is leaf wood
Any one or more of fiber, bamboo fibre, flaxen fiber and cotton fiber are mixed in any proportion；
(2) above-mentioned needlebush pulp lap and plant nanometer fiber wet pulp plate are discongested respectively, are beaten, make the matter of slurries
It is 0.5~2% to measure percent concentration, and beating time is 10 minutes~50 minutes, and it is 10 ° of SR to make the Xiao Baier beating degrees of slurry
~60 ° of SR, respectively obtain the first pulp suspension and the second pulp suspension；
(3) by nanofiber dispersion in deionized water, the 3rd paper pulp that mass percent concentration is 0.5~2% is obtained
Suspension, ultrasonic disperse processing is carried out to the 3rd pulp suspension, and ultrasonic power is 500W~1800W, and ultrasonic time is 5 minutes
~30 minutes；
(4) above-mentioned first pulp suspension, the second pulp suspension and the 3rd pulp suspension are blended, blending
Solids in suspension fiber quality ratio is：First pulp suspension:Second pulp suspension:3rd pulp suspension=1st:(0.
~0.2):It is 0 when (0~0.2), the second pulp suspension and the 3rd pulp suspension are different, is stirred after blending, during stirring
Between 5 minutes~20 minutes, obtain micron/nano composite fiber suspension；In micron/nano composite fiber suspension, nanofiber
Ratio is no more than 20%, and the ratio of other micrometer fibers is no more than 20%, fine to needlebush to realize remaining as needle-leaved wood fibre
Tie up effective calking of micrometer level porous structure；
(5) above-mentioned micron/nano composite fiber suspension is put into sheet forming equipment and carries out dehydration forming, insulated
L Water Paper page；
(6) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 100N/cm2~500N/cm2, hot pressing temperature
For 100 DEG C~150 DEG C, hot pressing time is 5 minutes~30 minutes, obtains the electric insulation paper after hot-pressing drying.
(7) the above-mentioned electric insulation paper product prepared is placed in the constant temperature and humidity that 25 DEG C of temperature, relative humidity are 50%
Stored in environment standby.
Mashing mode in the inventive method, can starch dry pulp plate by softwood pulp dry pulp plate and other micrometer fibers respectively
Pulpboard, is torn into 25mm × 25mm small pieces by immersion 12 hours in deionized water after immersion is good.Followed by beater to place
The needlebush pulpboard and other micrometer fibers pulpboards managed are discongested, are beaten respectively.Then nanofiber suspension is carried out
Ultrasonic disperse processing, after the completion of processing, according to quality proportioning, takes appropriate softwood pulp fiber, other micrometer fibers and nanometer
Fiber is mixed, well mixed to ensure, is handled 5 minutes~20 minutes using agitating device.Can also be using mixing mashing
Mode, needlebush pulpboard and other micrometer fibers pulpboards that will be by pretreatment be directly mixed in proportion, then utilize mashing
Machine is discongested, is beaten, and Xiao Baier beating degrees are equally controlled between 10 ° of SR to 60 ° of SR.
The embodiment of preparation method of the present invention introduced below：
Embodiment 1
(1) at ambient temperature, the submergence of softwood pulp dry pulp plate is soaked 12 hours in deionized water, obtains needlebush
Starch pulp lap.The softwood pulp dry pulp plate used in the present embodiment is Canadian prince's George paper pulp；
(2) beater is utilized, above-mentioned softwood pulp pulp lap is discongested, is beaten, makes stock quality percent concentration
For 0.5%, beating time is 25 minutes, and the Xiao Baier beating degrees of resulting slurry are 37 ° of SR.
(3) page quantification 490g/m2, the above-mentioned needle-leaved wood fibre suspension of 12L is taken, is put into sheet forming equipment and is taken off
Water is molded, the electric insulation paper l Water Paper page of specification needed for obtaining；
(4) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 500N/cm2, hot pressing temperature is 115 DEG C, heat
The pressure time is 5 minutes, obtains the electric insulation paper product after hot-pressing drying.
(5) the above-mentioned electric insulation paper product prepared is placed in the constant temperature and humidity that 25 DEG C of temperature, relative humidity are 50%
Stored in environment standby.
Test result：Page tightness is 0.95g/cm3, tensile strength is 109MPa, and specific insulation is 2.1 × 1014
AC breakdown strength is 10.9kV/mm in Ω m, air, and dc breakdown field strength is 20.7kV/mm, needle-leaved wood fibre in air
The graph of pore diameter distribution of insulating paper is as shown in figure 1, the scanning electron microscope diagram of needle-leaved wood fibre insulating paper is as shown in Figure 3.
Embodiment 2
(1) at ambient temperature, softwood pulp dry pulp plate and hardwood pulp dry pulp plate are submerged in deionized water respectively
Immersion 12 hours, obtains softwood pulp pulp lap and hardwood pulp pulp lap；The hardwood pulp dry pulp plate that the present embodiment is used is
Fujian Qingzhou masson pine paddle board, softwood pulp dry pulp plate is Canadian prince's George paper pulp；
(2) beater is utilized, above-mentioned softwood pulp pulp lap and hardwood pulp pulp lap are discongested respectively, are beaten,
So that the mass fraction of softwood pulp slurries is 0.5%, beating time is 25 minutes, and the Xiao Baier beating degrees of resulting slurry are
37° SR；The mass fraction of hardwood pulp slurries is 0.5%, and beating time is 20 minutes, and the Xiao Baier of resulting slurry is beaten
Spend for 37 ° of SR, so respectively obtain the first pulp suspension and the second pulp suspension；
(3) above-mentioned first pulp suspension and the second pulp suspension are blended, the solids in suspension of blending is fine
Tieing up mass ratio is：Needle-leaved wood fibre 97.5%, broad-leaved wood fiber 2.5%.Stirred after blending, mixing time 5 minutes is obtained
To softwood and hardwood composite fibre suspension；.
(4) page quantification 490g/m2, the above-mentioned pulp suspensions of 12L are taken, is put into sheet forming equipment and is dehydrated into
Type, the electric insulation paper l Water Paper page of specification needed for obtaining；
(5) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 500N/cm2, hot pressing temperature is 105 DEG C, heat
The pressure time is 5 minutes, obtains the electric insulation paper product after hot-pressing drying.
(6) the above-mentioned electric insulation paper product prepared is placed in the constant temperature and humidity that 25 DEG C of temperature, relative humidity are 50%
Stored in environment standby.
Test result：Page tightness is 1g/cm3, tensile strength is that AC breakdown strength is in 112.4MPa, air
Dc breakdown field strength is 20.8kV/mm in 11.8kV/mm, air.Tensile strength lifting 3%, AC breakdown strength lifting 8%,.
Embodiment 3
(1) at ambient temperature, softwood pulp dry pulp plate and the submergence of bamboo pulp dry pulp plate are soaked in deionized water respectively
12 hours, obtain softwood pulp pulp lap and bamboo pulp pulp lap.The dry paddle board of softwood pulp used in the present embodiment is Canada
Lebistes reticulatus paper pulp, the dry paddle board of bamboo pulp is produced by Sichuan Yongfeng company；
(2) beater is utilized, above-mentioned softwood pulp pulp lap and bamboo pulp pulp lap are discongested respectively, are beaten so that
Softwood pulp grind slurries quality fraction is 0.5%, and beating time is 25 minutes, and the Xiao Baier beating degrees of gained slurry are 37 ° of SR；
Bamboo pulp mass fraction is 0.5%, and beating time is 15 minutes, and the Xiao Baier beating degrees of gained slurry are 37 ° of SR, so
Obtain the first pulp suspension and the second pulp suspension；
(3) above-mentioned first pulp suspension and the second pulp suspension are blended, the solids in suspension of blending is fine
Tieing up mass ratio is：Needle-leaved wood fibre 90%, bamboo fibre 10%.Stirred after blending, mixing time 5 minutes obtains needle
Wood and bamboo composite fibre suspension；
(4) page quantification 490g/m2, the above-mentioned pulp suspensions of 12L are taken, is put into sheet forming equipment and is dehydrated into
Type, the electric insulation paper l Water Paper page of specification needed for obtaining；
(5) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 500N/cm2, hot pressing temperature is 115 DEG C, heat
The pressure time is 10 minutes, obtains the electric insulation paper product after hot-pressing drying.
(6) the above-mentioned electric insulation paper product prepared is placed in the constant temperature and humidity that 25 DEG C of temperature, relative humidity are 50%
Stored in environment standby.
Test result：Page tightness is 1.01g/cm3, tensile strength is 115MPa, and specific insulation is 2.4 × 1014
AC breakdown strength is 12.4kV/mm in Ω m, air, and dc breakdown field strength is 21.9kV/mm in air.Tensile strength is carried
Rise 5.5%, AC breakdown strength lifting 13.8%, dc breakdown field strength lifting 5.8%.
Embodiment 4
(1) at ambient temperature, softwood pulp dry pulp plate and the submergence of cotton pulp dry pulp plate are soaked in deionized water respectively
12 hours, obtain in softwood pulp pulp lap and cotton pulp pulp lap, the present embodiment softwood pulp dry pulp plate be Byelorussia it is bright this
Gram paper pulp, cotton pulp dry pulp plate is then provided by University Of Science and Technology Of Tianjin；
(2) beater is utilized, above-mentioned softwood pulp pulp lap and cotton pulp pulp lap are discongested respectively, are beaten, makes pin
Leaf wood pulp slurry mass fraction is 0.5%, and beating time is 25 minutes, and the Xiao Baier beating degrees of gained slurry are 37 ° of SR；Cotton
It is 0.5% to starch stock quality fraction, and beating time is 16 minutes, and the Xiao Baier beating degrees of gained slurry are 37 ° of SR, such
To the first pulp suspension and the second pulp suspension；
(3) above-mentioned the first pulp suspension and the second pulp suspension are blended, the solids in suspension of blending
Fiber quality ratio is：Needle-leaved wood fibre 95%, cotton fiber 5%.Stirred after blending, mixing time 10 minutes obtains pin
Ye Mu and the composite fibre suspension of cotton；(4) page quantification 490g/m2, the above-mentioned pulp suspensions of 12L are taken, sheet forming is put into
Dehydration forming is carried out in equipment, the electric insulation paper l Water Paper page of specification needed for obtaining；
(5) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 500N/cm2, hot pressing temperature is 115 DEG C, heat
The pressure time is 10 minutes, obtains the electric insulation paper product after hot-pressing drying.
(6) the above-mentioned electric insulation paper product prepared is placed in the constant temperature and humidity that 25 DEG C of temperature, relative humidity are 50%
Stored in environment standby.
Test result：Page tightness is 1.01g/cm3, tensile strength is that AC breakdown strength is in 109MPa, air
Dc breakdown field strength is 21.7kV/mm in 11.3kV/mm, air.AC breakdown strength lifting 3.7%, dc breakdown field strength is carried
4.8%.
Embodiment 5
(1) at ambient temperature, the submergence of softwood pulp dry pulp plate is soaked 12 hours in deionized water, obtains needlebush
It is Canadian prince's George paper pulp to starch softwood pulp dry pulp plate in pulp lap, the present embodiment；
(2) beater is utilized, above-mentioned softwood pulp pulp lap is discongested, is beaten, the mass fraction for making slurries is
0.5%, beating time is 25 minutes, and the Xiao Baier beating degrees of gained slurry are 37 ° of SR, obtain the first pulp suspension.
(3) it is leaf wood nano-cellulose is scattered in deionized water, form the 3rd paper pulp that mass fraction is 0.5% and hang
Supernatant liquid, ultrasonic disperse processing is carried out to the 3rd pulp suspension, and ultrasonic power is 1260W, and ultrasonic time is 5 minutes.
(4) above-mentioned the first pulp suspension and the 3rd pulp suspension are blended, the solids in suspension of blending
Fiber quality ratio is：Needle-leaved wood fibre 90%, nanofiber 10%.Stirred after blending, mixing time 5 minutes is obtained
Micro-nano complex fiber suspension；
(5) page quantification 490g/m2, the above-mentioned pulp suspensions of 12L are taken, is put into sheet forming equipment and is dehydrated into
Type, the electric insulation paper l Water Paper page of specification needed for obtaining；
(6) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 500N/cm2, hot pressing temperature is 115 DEG C, heat
The pressure time is 5 minutes, obtains the electric insulation paper product after hot-pressing drying.
(7) the above-mentioned electric insulation paper product prepared is placed in the constant temperature and humidity that 25 DEG C of temperature, relative humidity are 50%
Stored in environment standby.
Test result：Page tightness is 0.99g/cm3, tensile strength is that AC breakdown strength is in 136MPa, air
Dc breakdown field strength is 24.9kV/mm in 12.9kV/mm, air.Tensile strength lifting 24.8%, AC breakdown strength lifting
18%, dc breakdown field strength lifting 20%, be the pore-size distribution of 10% nanofiber and 90% micrometer fibers composite-insulating paper such as
Shown in Fig. 2, the scanning electron microscope diagram of 10% nanofiber and 90% micrometer fibers composite-insulating paper is as shown in Figure 4.
Claims (1)
1. a kind of preparation method of micron/nano composite fiber electric insulation paper, it is characterised in that the preparation method includes following step
Suddenly：
(1) at ambient temperature, needlebush dry pulp plate and plant nanometer fiber dry pulp plate are submerged in deionized water respectively, leaching
Bubble 12 hours, obtains needlebush pulp lap and plant nanometer fiber wet pulp plate, described plant nanometer fiber is broad-leaved wood fiber,
Any one or more of bamboo fibre, flaxen fiber and cotton fiber are mixed in any proportion；
(2) above-mentioned needlebush pulp lap and plant nanometer fiber wet pulp plate are discongested respectively, are beaten, make the quality hundred of slurries
It is 0.5~2% to divide specific concentration, and beating time is 10 minutes~50 minutes, and it is 10 ° of SR~60 ° to make the Xiao Baier beating degrees of slurry
SR, respectively obtains the first pulp suspension and the second pulp suspension；
(3) by leaf wood nanofiber dispersion in deionized water, the 3rd paper that mass percent concentration is 0.5~2% is obtained
Mass suspension, ultrasonic disperse processing is carried out to the 3rd pulp suspension, and ultrasonic power is 500W~1800W, and ultrasonic time is 5 points
Clock~30 minute；
(4) above-mentioned first pulp suspension, the second pulp suspension and the 3rd pulp suspension are blended, the suspension of blending
Solid fiber mass ratio is in liquid：First pulp suspension:Second pulp suspension:3rd pulp suspension=1st:(0.~
0.2):It is 0 when (0~0.2), the second pulp suspension and the 3rd pulp suspension are different, is stirred after blending, mixing time
5 minutes~20 minutes, obtain micron/nano composite fiber suspension；
(5) above-mentioned micron/nano composite fiber suspension is put into sheet forming equipment and carries out dehydration forming, obtain the l Water Paper that insulate
Page；
(6) hot-pressing processing is carried out to above-mentioned insulation l Water Paper page, hot pressing pressure is 100N/cm2~500N/cm2, hot pressing temperature is 100
DEG C~150 DEG C, hot pressing time is 5 minutes~30 minutes, obtains the electric insulation paper after hot-pressing drying；
(7) the above-mentioned electric insulation paper product prepared is placed in the constant-temperature constant-humidity environment that 25 DEG C of temperature, relative humidity are 50%
Middle storage is standby.
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| CN108914682A (en) * | 2018-07-06 | 2018-11-30 | 京东方科技集团股份有限公司 | The preparation method of paper, antireflection layer, photovoltaic device and preparation method thereof |
| CN109024094A (en) * | 2018-08-13 | 2018-12-18 | 华南理工大学 | A kind of micro nanometer fiber cellulose fiber/aramid fiber composite-insulating paper and preparation method thereof |
| CN109722945A (en) * | 2018-11-30 | 2019-05-07 | 山东鲁南新材料股份有限公司 | The resistance to breakdown combined electrolysis kraft capacitor paper of one kind and its production method |
| CN110528336A (en) * | 2019-07-29 | 2019-12-03 | 华南理工大学 | A kind of high tensile high density fiberboard and its environment-friendly preparation method thereof |
| CN111705542A (en) * | 2020-05-27 | 2020-09-25 | 仙鹤股份有限公司 | Preparation method of paster capacitor paper |
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| US20080302495A1 (en) * | 2002-09-04 | 2008-12-11 | Vincent Lorentz | Articles comprising fibres and/or fibrids, fibres and fibrids and process for obtaining them |
| JP2016171048A (en) * | 2015-03-16 | 2016-09-23 | 三菱製紙株式会社 | Lithium ion secondary battery separator and lithium ion secondary battery arranged by use thereof |
| CN104863022A (en) * | 2015-05-08 | 2015-08-26 | 清华大学 | Method for preparing electrical insulating papers containing broadleaf wood fibers |
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| CN108914682A (en) * | 2018-07-06 | 2018-11-30 | 京东方科技集团股份有限公司 | The preparation method of paper, antireflection layer, photovoltaic device and preparation method thereof |
| CN109024094A (en) * | 2018-08-13 | 2018-12-18 | 华南理工大学 | A kind of micro nanometer fiber cellulose fiber/aramid fiber composite-insulating paper and preparation method thereof |
| CN109722945A (en) * | 2018-11-30 | 2019-05-07 | 山东鲁南新材料股份有限公司 | The resistance to breakdown combined electrolysis kraft capacitor paper of one kind and its production method |
| CN109722945B (en) * | 2018-11-30 | 2021-07-20 | 山东鲁南新材料股份有限公司 | Breakdown-resistant composite electrolytic capacitor paper and production method thereof |
| CN110528336A (en) * | 2019-07-29 | 2019-12-03 | 华南理工大学 | A kind of high tensile high density fiberboard and its environment-friendly preparation method thereof |
| CN111705542A (en) * | 2020-05-27 | 2020-09-25 | 仙鹤股份有限公司 | Preparation method of paster capacitor paper |
| CN111705542B (en) * | 2020-05-27 | 2022-02-15 | 仙鹤股份有限公司 | Preparation method of paster capacitor paper |
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